Avalanche Advisory for Tuckerman and Huntington Ravines
Posted: 8:47 a.m., Saturday, January 17, 2004

Tuckerman Ravine currently has MODERATE and LOW avalanche danger. Right Gully, The Bowl, Lip and Headwall have Moderate avalanche danger. Natural avalanches are unlikely and human triggered avalanches are possible. Unstable slabs are possible in steep terrain. Use caution in steeper terrain. All other areas in Tuckerman Ravine have Low avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised.

Huntington Ravine has LOW avalanche danger. Natural avalanches are very unlikely and human triggered avalanches are unlikely except in isolated pockets. Normal caution is advised.

The ridiculously low temperatures may have abated for the day but the winds have most certainly not. In the last 24 hours winds have averaged 151 kph (94 mph) with a peak gust of 233 kph (145 mph). Today's forecast calls for about the same speeds with temps reaching above -18C (0F). With the windchills as low as they are it will still feel just like the arctic out there.

Some fracture lines are visible in Tuckerman this morning but others have become obscured since the ravine became socked in on Thursday. The high winds have moved snow around and some substantial pockets still exist on strong lee aspects. The areas of most concern are those posted at Moderate today although isolated pockets may exist in those posted at Low. Today's warming temperatures will encourage the settlement of these instabilities that have lingered through the past week's extreme cold. If traveling in avalanche terrain today try and travel on old surface whenever possible. These areas may have been exposed as a result of wind scouring or past avalanche activity.

The John Sherburne ski trail has variable conditions. Expect areas of water ice, new drifts, and abrupt water bars. Be prepared for sudden changes in the trail.

THE LION HEAD WINTER ROUTE IS OPEN. This is a steep and challenging route. Ice axe, crampons, and the skill to use them well are necessary for safe travel. Remember, it is always easier to go up than come down.

AS ALWAYS, THIS ADVISORY IS ONE MORE TOOL TO HELP YOU MAKE YOUR OWN DECISIONS IN AVALANCHE TERRAIN. It should be used along with your own snow stability assessments, knowledge of safe travel techniques, skill in reading mountain weather's effect on the snowpack, and avalanche rescue.

Please Remember:
•   ****Any new precipitation may increase the avalanche danger, this includes wind transported snow. ****Obtain the latest weather forecast before starting out. ****For more information, contact any of the following: U.S. Forest Service Snow Rangers, AMC at the Pinkham Notch Visitor Center, AMC at the Hermit Lake Shelters, HMC at the Harvard Cabin. ****This avalanche advisory will expire at midnight.****

Justin Preisendorfer, Snow Ranger
USDA Forest Service
White Mountain National Forest
(603) 466-2713 TTY (603) 466-2856
 
This is the Official Tuckerman Ravine website.  Occasionally the remoteness of Tuckerman Ravine, weather, or communication problems prevent the website from being updated immediately.  Check the date, and if it is not the most recent, you can also call the National Forest Service's 24 hour avalanche hotline at (603) 466-2713 (ext. 4)

Avalanche Advisory Archives.

United States Avalanche Danger Descriptions.

Échelle Canadienne de risque d’avalanche.

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